games more like, games like black ops 2 supports dolby digital apparently. Im looking on the back of the black ops 2 box right now and it shows dolby digital. I would love to also use dolby digital on battlefield 3 as well. DTS 5.1 surround sound would also be awesome.

I believe AC3 is what you are looking for. Bitstream I believe is LCPM which is supported only on high end devices and only necesary for Blu-Ray.

I use AC3 in FFDshow and get dolby and DTS audio passthrough on my IGPs to my receiver (It supports both) for the last few years. I am currently using monitors inbuilt speakers and/or a cheap pair of desktop speakers so audio is not really a consideration right now (my onkyo/polk setup is crying as it gets covered in dust )

Also you can set Dolby in your audio drivers, if not, then try using windows audio service to show available options, you can test Dolby, DTS and IIRC Pro audio (a microsoft thing that I have never seen anything support). You can test bit rates and sample sizes as well to find comparable unit to your receiver/monitor. (IF you are not using a receiver and separate speakers, then do not even worry about what sound is going through your card).

No, the HDMI port on the graphics card only has passthrough capabilities. If the content is natively encoded in 5.1, the card will pass a 5.1 signal, if it's encoded in stereo it will pass an stereo signal. Some games have 5.1 audio some don't.

To get 5.1/7.1 in all your games you'll need a sound card with DTS Neo or Dolby Digital Live.

Is it possible to get dolby digital, or dts 5.1 through hdmi on the pc? i have a radeon 5770]
my receiver is the yamaha HTR-6063

Click to expand...

No, no, no, use 7.1 PCM. Dolby is encoded, PCM is not. If you can set the HDMI audio output to 7.1 LPCM, that's all you need to do. The computer/receiver should take care of the rest. That's the best possible signal to send on HDMI.

No, no, no, use 7.1 PCM. Dolby is encoded, PCM is not. If you can set the HDMI audio output to 7.1 LPCM, that's all you need to do. The computer/receiver should take care of the rest. That's the best possible signal to send on HDMI.

AC3 is the encoding used on DVDs.

Click to expand...

With his receiver, using bit stream would be better since it can decode everything being sent at it. LPCM is essentially decoded in the machine then the sound sent to the receiver. If the goal is to get to 7 speakers somehow, then LPCM can work if he's got some virtualization for his sound, but if accurate and good sound is the target with the hopes of game makers utilizing the best available, Bitstream all the way.

games more like, games like black ops 2 supports dolby digital apparently. Im looking on the back of the black ops 2 box right now and it shows dolby digital. I would love to also use dolby digital on battlefield 3 as well. DTS 5.1 surround sound would also be awesome.

Click to expand...

No they are not Dolby Digital despite any images at the back of the box. They have 5 audio streams which can be encoded to Dolby Digital with the aid of a soundcard that supports Dolby Digital Live Encoding or DTS Connect Encoding.

With his receiver, using bit stream would be better since it can decode everything being sent at it. LPCM is essentially decoded in the machine then the sound sent to the receiver. If the goal is to get to 7 speakers somehow, then LPCM can work if he's got some virtualization for his sound, but if accurate and good sound is the target with the hopes of game makers utilizing the best available, Bitstream all the way.

Click to expand...

PCM is the raw wave. It is never encoded/decoded if the source is digital to begin with. Games prefer PCM because they can play a mono-sound through many positional channels. You lose signal quality when encoding decoding so it's best not to do it.

Dolby Digital only exists to turn 2 channels into more than 2 either due to the source only being stereo or the cable it is conveyed through not having enough bandwidth to handle many channels.

No they are not Dolby Digital despite any images at the back of the box. They have 5 audio streams which can be encoded to Dolby Digital with the aid of a soundcard that supports Dolby Digital Live Encoding or DTS Connect Encoding.